3112d0f1b0
The acomp API allows to send requests with a NULL destination buffer. In this case, the algorithm implementation needs to allocate the destination scatter list, perform the operation and return the buffer to the user. For decompression, data is likely to expand and be bigger than the allocated buffer. This implements a re-submission mechanism for decompression requests that is triggered if the destination buffer, allocated by the driver, is not sufficiently big to store the output from decompression. If an overflow is detected when processing the callback for a decompression request with a NULL destination buffer, a workqueue is scheduled. This allocates a new scatter list of size CRYPTO_ACOMP_DST_MAX, now 128KB, creates a new firmware scatter list and resubmits the job to the hardware accelerator. Suggested-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/* Copyright(c) 2014 - 2022 Intel Corporation */
|
|
#ifndef QAT_BL_H
|
|
#define QAT_BL_H
|
|
#include <linux/crypto.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/types.h>
|
|
|
|
#define QAT_MAX_BUFF_DESC 4
|
|
|
|
struct qat_alg_buf {
|
|
u32 len;
|
|
u32 resrvd;
|
|
u64 addr;
|
|
} __packed;
|
|
|
|
struct qat_alg_buf_list {
|
|
u64 resrvd;
|
|
u32 num_bufs;
|
|
u32 num_mapped_bufs;
|
|
struct qat_alg_buf bufers[];
|
|
} __packed;
|
|
|
|
struct qat_alg_fixed_buf_list {
|
|
struct qat_alg_buf_list sgl_hdr;
|
|
struct qat_alg_buf descriptors[QAT_MAX_BUFF_DESC];
|
|
} __packed __aligned(64);
|
|
|
|
struct qat_request_buffs {
|
|
struct qat_alg_buf_list *bl;
|
|
dma_addr_t blp;
|
|
struct qat_alg_buf_list *blout;
|
|
dma_addr_t bloutp;
|
|
size_t sz;
|
|
size_t sz_out;
|
|
bool sgl_src_valid;
|
|
bool sgl_dst_valid;
|
|
struct qat_alg_fixed_buf_list sgl_src;
|
|
struct qat_alg_fixed_buf_list sgl_dst;
|
|
};
|
|
|
|
struct qat_sgl_to_bufl_params {
|
|
dma_addr_t extra_dst_buff;
|
|
size_t sz_extra_dst_buff;
|
|
};
|
|
|
|
void qat_bl_free_bufl(struct adf_accel_dev *accel_dev,
|
|
struct qat_request_buffs *buf);
|
|
int qat_bl_sgl_to_bufl(struct adf_accel_dev *accel_dev,
|
|
struct scatterlist *sgl,
|
|
struct scatterlist *sglout,
|
|
struct qat_request_buffs *buf,
|
|
struct qat_sgl_to_bufl_params *params,
|
|
gfp_t flags);
|
|
|
|
static inline gfp_t qat_algs_alloc_flags(struct crypto_async_request *req)
|
|
{
|
|
return req->flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : GFP_ATOMIC;
|
|
}
|
|
|
|
int qat_bl_realloc_map_new_dst(struct adf_accel_dev *accel_dev,
|
|
struct scatterlist **newd,
|
|
unsigned int dlen,
|
|
struct qat_request_buffs *qat_bufs,
|
|
gfp_t gfp);
|
|
|
|
#endif
|